Time reversal may refer to:
- In physics, T-symmetry - the study of thermodynamics and the symmetry of certain physical laws where the concept of time is reversed — i.e. where a mirror (reverse) transformation is applied to a forward direction time state.
- Time Reversal Signal Processing, a signal processing technique popular in acoustics, and currently being applied to electromagnetics, that results from the reversal in time of a system's response signal
- Time travel, theorised and speculative concepts about travelling physically through time
Famous quotes containing the words time and/or reversal:
“I lay my eternal curse on whomsoever shall now or at any time hereafter make schoolbooks of my works and make me hated as Shakespeare is hated. My plays were not designed as instruments of torture. All the schools that lust after them get this answer, and will never get any other.”
—George Bernard Shaw (1856–1950)
“Perversity depends on reversal and substitution.”
—Mason Cooley (b. 1927)
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